/*
 * Copyright 2013 Pavel Stastny <pavel.stastny at gmail.com>.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.aplikator.server.util;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Pavel Stastny <pavel.stastny at gmail.com>
 */
public class IOUtils {

    public static final Logger LOGGER = Logger.getLogger(IOUtils.class.getName());

    public static void tryClose(InputStream is) {
        try {
            if (is != null) {
                is.close();
            }
        } catch (IOException ex) {
            LOGGER.log(Level.SEVERE, null, ex);
        }
    }

    public static void tryClose(OutputStream os) {
        try {
            if (os != null) {
                os.close();
            }
        } catch (IOException ex) {
            LOGGER.log(Level.SEVERE, null, ex);
        }
    }

    public static void copyStreams(InputStream is, OutputStream os) throws IOException {
        byte[] buffer = new byte[8192];
        int read = -1;
        while ((read = is.read(buffer)) > 0) {
            os.write(buffer, 0, read);
        }
    }

    public static byte[] readBytes(InputStream is, boolean closeInput) throws IOException {
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            copyStreams(is, bos);
            return bos.toByteArray();
        } finally {
            if ((is != null) && closeInput) {
                is.close();
            }
        }
    }

    public static void saveToFile(byte[] data, File file) throws IOException {
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(file);
            fos.write(data);
        } finally {
            if (fos != null) {
                fos.close();
            }
        }
    }
}
